add npm publish to server and client release process

[bollwyvl]

Sorry for the cheeky PR!

Thanks for the great tool!

A la #34, we would like to add RF LSP support for another client. We respect that a lot of servers will be built on the nodejs tooling, and go to great pains to support node-based language servers where possible (but are likewise trying to figure out how to bundle them for the browser, if possible).

It's somewhat unreasonable to expect end users to do git clone, add all the build/test dependencies. To avoid this, (at least) the server package would need to be accessible in a non-vscode places, which pretty much means npmjs (or I guess github, now, maybe).

Please consider publishing these!